rudin



Aug; 14, 1923. I 1,464,778

- K. v. RUDIN ZEROIZING MEANS FOR THE CURVE DISKS=OFCALCULATING-MACHINES Filed April 10 1919 2 Sheets-Sheet 1 Aug. 14, 1923.1,464,778

K. V. RUDIN ZEROIZING MEANS FOR THE CURVE DISKS OF CALCULATING MACHINESFiled April 10-, 1919 2 Sheets-Sheet 2 Patented Aug. 14, 1923 iUNITEIIDFYSTATES 1 1,464,718 PATENT OFFICE;

KARL V IK'ITOR RUDI N, 0F STOCKHOLM, SWEDEN.

' zERorzI 1 'Ie MnAivs non THE cimvn wears on CALCULATING ivrncrn vns.

Application filed April- 10,

To all whom/it may concern: p 1

Be it known that 1, KARL VIK'ron RUDIN, correspondent, subject of theKing of Sweden, residing at Stockholm, Sweden, have invented certain newand useful Improvements in Zeroizing Means for the Curve Disks ofCalculating Machines (for which I have filed application for patent inSweden, No.'1151,-1918, filed- March 26', 1918), of which the followingis aspecification.

The present invention relates to certain improvements in zeroizing meansfor the curve-disks of calculating machines ofxthat kind wherein asetting mechanism is provided with settingwheels and curve-disks, and inwhich the setting wheels are provided with avariable number of teethadapted to be actuated by the curve-disks in setting the mechanism for acertain value; 1

An object of the invention is to provide means independent of theabove-named means for locking the curve-disks, when set, so as toprevent them from being thrown out of position during the calculatingoperation, that is to say,during the rotation of the setother.

Another object is to provide a zeroizing other setting of the same, andconsequently,

7 another. calculating operation, is made im completech v 7 possible,until thezeroizing operation is" A further object is to construct the'mecha nism in such a way'that the rotation ofthe setting mechanism andconsequently, another calculating operation, whose result would vbeincorrect, is made impossible, if the setting ofthe curve-disks foranother calculation be effected or the zeroizing mechanism be-actuatedprematurely. 9

A further object of this invention is to providea means easilyattachable to a calside of the 'lnachinein such a way-that the shaft,when actuated by the, said member, is

, rotated in the opposite direction, thus" resetting all the curvedisks'in Zero position;

claimed. ting mechanism in one dlllBCtlOIl' or the 1919. Serial No.289,100.

An essential feature of my invention and an important object thereofconsists in providing means consisting of the connec tion betweentheshaft passing through the setting mechanism of the machine and thecurve-disks in the form of pins or studs, ex-

tending from the shaft, said pins or studs being arranged in the path ofpins or studs i fully claimed.

we With these and other objects in view the invention consists in theconstruction, combination, details and arrangement of parts hereinaftermore fully described and In the drawings Figure 1' is a longitudinalsection.

Figure 2 is a cross section looking from the'left of Figure 1of'a'calcula'ting' machine provided with my invention.

Figure 3 is a modified form.

Figure 4 is a detail view. 7

Figure 5 shows from the right in partial [section the zeroizingorganproper according 'to an embodiment of the invention.

Figures'G and 7 show from theside and '7 in front view in partialsection the zeroizing organ'or unit in accordance with another ormodified form of my invention. 7

Figures 8 and 9 show detail views of the mechanism for step-by-stepsetting'of ,the.

curve-disks into two different positions.

Referring to the drawings," the setting mechanism ofthe machineconsists, as usual,

of setting wheels 1 with curve-disks 2, the; culating machine havingashaft passing" through" the setting mechanism ofQthe machine and socomiected with the curvedisks shaft for setting wheels being indicatedby thenumeral14. In the preferred form the connection between the shaftpassing throughthe setting mechanism of thev machine and thecurve-disksconsists of pins or studs 49 ,shown to advantage in Figures2. and 3, extending from, the shaft 14 and lying in the way or pathofstuds 50- arranged: on the curve disks. The shaft 14 is of myinvention in two different embodiments.

put into the bearing member 5a of the settinp; wheels 1 and the pins orstuds 19 are inserted into perforations therein and may in anyconvenient manner be attached to the shaft but preferably as shown inFigures 2 and 3, the said pins or studs may be locked by a key 53sliding in a keyway 52 in the shaft, the pins being inserted into theopenings or perforations 51 in the shaft 1 1, which. openings orperforations 51 pass trans-- versely of the shaft. In such a way thepins are reliably ecured to the shaft 1&.

A sleeve Set surrounds the shaft 1 1 and is provided with a transverseslit opposite each pin or stud, of suitable length, preferably onethirdor one-fourth the length of the periphery. The surfaces 56 of the recessor slot 55 formed in said way, form in connection with the surface 57 ofthe hub 58 on each setting wheel. the same being' also provided. withslits, a limiting surface or surfaces for the movement; of the pins orstuds.

A pin is suitably, in the same manner as the pins or studs 49. attachedto the shaft 14 and is actuated by the zeroizing means.

This latter is illustrated in the drawings According to the firstembodiment shown in Figures 1 to 5, the organ or other member consistsof a double armed lever, the one arm 60 of which is looselymounted uponthe sleeve 54., journaled on the shaft 1.4;, and the other arm 61 ofwhich is pivotal in relation to the former arm 60 and provided vith ashoulder or the like 62, adapted to mesh with the pin 59 or any otherpart extending from. the shaft 1 1, when the arm 61 is in its operativeposition. The arm 61 is pivotally arranged about the shaft (53 and isactuated by. a spring (34twhich normally holds the arm in restingposition. In this position the arm permits the free passage of the pin59 during the calculating.

The arm 61 is provided. with a handle 65 in order to make it possible tomanipulate the sai'ne. In manipulating the arm 61, viz, pressing thehandle 65 upwards, the shoulder (32 is turned downwards so as to meshwith the pin 59 (Fig. 5). In further turning the arm 61 together withthe arm 60 clockwise the shaft 14 is likewise, by means of the pin 59,turned clockwise and the curve discs are reset to zero.

In order to limit the extent of movement of the arm 61 in relation tothe arm 60 one of the arms, for instance, preferably the arm 61, isprovided with a pin or stud 66, entering into andrunning in a recess 67of the other arm, for instance 60 when the first named arm is manuallymoved against the resistance of the spring.

It isevidenh'that the parts limiting the movement of the arm'61 may alsobe arranged-in another way. The recess 67 may for instance consistof aslot or. the like, and.

the calculating machine.

the pin 66 of a shoulder or the like, or an other surface being able topush against tl e surface of the other arm.

The movement of the arm 60 or rather of the zeroizing member as a whole,is limited by the medium of the support 68, against which the arm 60 iscaused to push. The zzeroizing member as a whole is actuated by a spring69 tending' to more the organ back into its resting position.

In a modified form shown in Figs. 6 and 7, there is a difference fromthat already described in that the different parts of the organ arearranged as follows: The shoulder 62 is replaced by a pin or stud 62.Further, the spring 64 is here so arranged that it is inserted inarecess 70 of the arm 60, whereby the one end of the spring restsagainst the bottom of the recess, while the other end of the springrests against a pin 7]. arranged in the recess and pressing against thearm 61 and holding the same in its resting position, that is to say, insuch a way that the pin 62' is out of the way of the pin 59. Themovement of the arm 61 in relation to the arm 60 is thus limited so thatwhen the arm 61. is in its extreme position its surface 72, abuts theopposite S111- face of the arm 60, shown better in Fig. 6. in theextreme position shown in Fig. 6, the surface 73 of the arm 61 abuts theopposite surface of the arm 60.

The zeroizing means may also consist of a knurled knob G1 handle or thelike pl: 1 red outside the machine and attached directly to the shaft asillustrated in Fig. 3. In such case the shaft 14 is rotatable directlyand all intermediate means are superfluous.

More particularly describing this structure the known arrangementisconstructed in such a way that according to l ig. 1 the member 2 isprovided with teeth 76 in which teeth apawl is yieldingly held by aspring 77, as better shown in Figure 2. Normally this pawl cannot bemoved from engagement with the teeth because of a block 8-): in itspath, in the form of a slotted shaft which shaft is movable by a lever36 into the two positions, one shown in Fig. 8, and the other shown inFig. 9. The lever 36 is provided with a lug 86 seating into a recess &2in the casing, thereby permitting the turning of the member 2 only at atime when the said mechanism is in the position shown in Fig. 9, that isto say when the lug 86 is in the recess 12. The outward movement of thelever 36 into the recess 12 causes the said lever 36 to press against aplunger or pin 4,0 which is yieldingly held outward by a spring a0" andwhich spring is normally .pushed inward by a spring 40 pushing a plunger40 mounted upon a crank 40 for actuating Thus when the plunger 40* is ina predetermined position of the crank 40 pushing against the plungerorgan that the curve disks during the proper zeroizing are released"from the pawls'75, said pawls, one for each curve disk, are arrangedupon a shaft 74, shown in Figs. 2, 5 and 7, passing through the settingmechanism, whereby said pawls preferably elastically engage into thetoothed ring or the released and permit like 76 for each curve diskshown in Figs. 2, 8 and 9.

The shaft 74: for the pawls 75 has at one end an arm 78 provided with apinor stud 79, shown in Figs. 6 and 7 by means of which the shaft 74; isactuated by the zero izing organ. the pin or stud 7 9 may during thezeroizing operation slide over a curved surface or the like .80 on thezeroizing organ whereby the arm 78 will. be moved out to such position,as to allow: the engagement of the pawls 75 with the curve-disks. Hencethe moving back of the curve-disks into the zero posi tion isfacilitated, and a step-bystep setting of the curve-disks madeimpossible; should the new calculation be performed before completingthe zeroizing operation.

During the whole zeroizing operation the shaft 84 has the normalposition shown in Fig. 9 inwhich it allows the free movement of the.pawls 7 5. After having performed a new setting operation and anewturning of the setting mechanism is tobe performed the indentnre 86is pressed out of the recess l2 during the rotation of the crank, whichresults in a displacing of the shaft 84 to the left'side from theposition shown in Fig. 8. In this position the pawls '75 cannot berotated. and on accountof this the curve-disks cannot be'moved out oftheir set positions during the rotation of the setting mechanism.- Whenmoving the setting mechanism back into its initialposition the notch orindentiire 86 is again. moved into its reccss by means of the crank andthe bar 40 actuated by the se .i The pawls are thus a new setting of thecurve-disks.

It is to be'noted that the setting mecha.

nism or the crank cannotbe rotated during the zeroizing operation.Thisisattained by the pawls 75 being during this operation locked intheir outermost position in which they engage into the recesses 85 oftheshaft 84:, thus preventing the latter from being displaced to the left.Thus the notch 86 cannot be moved out of the recess 42, and

This is attained inasmuch as the setting mechanism or the crank cannotbe rotated.

What I claim is 1..In a calculating machine, in conibination with curveddisks and setting wheels,

zeroizing means mounted for manual movement, means to return thezeroizing means to normal position, pawls to engage teeth of the curvedisks, a shaft on which said pawls are pivotally mounted said shaft andpawls having means to pe it limited pivotal movement ofsaid pawls onsaid shaft,

and said shaft being operated by the zeroixing means to disengage thepawls from the curvec. dlSi teeth during Zeioizing.

2. In a calculating machine of the class described, in combination withcurved disks and setting wheels, pawls to engage teeth of the curveddisksand permit step i y-step setting thereof, and zeroizing means forthe curved disks, said zeroizing means also serving to disengage thepawls from the curved disk teeth during zeroizing.

and setting wheels, pawls to engageteeth of the curved disks and permitstep-by-step settin thereof, zeroizing means for the curved disks, saidzeroizing means also serviiigto. disengage the pawls from the curveddiskteeth during zeroizing, and means to prevent or permit operation ofthe pawls at will.

i. In a calculating machine, a calculating rotor. an arcuate portion ofsaid rotor pro- S. In calculatingv machine of the class described, incombination with curved disks through said rotors eccentric saidpivotal.

mount, a pawl. for engagement withisaid discal'inembers, saidpin in thepath of said pawl n its movement from disengagement with said. members,means for lon idinal 1y sliding said pin, and recesses in said pin topermit the escape of said pawl when said pin is in a predeterminedlongitudinal position. T

6. Means for Zeroizing the curve-disks after completed calculatingoperation in calc-ulating machines having setting wheels provided 'witha' variable number 'of teeth, said means consisting of a shaft passingthrough the setting mechanism of the machine, characterized by theconnection between the curve-disks and the shaft consisting of pins orstuds extending from the shaft, said pins or studs being brought in thepath of stops upon the curve-disks in such way that the curve-disksduring their setting movement catch the shaft while the latter duringthe Zcroizing operation is by means of the zeroizing member caused torotate in the opposite direction and during this movement by means ofthe pins or studs and the stops move all the curvedisks back intotheirzero position.

7. In a device according to claim 6, the arrangement that the shaftpassing through the setting mechanism of the machine consists of a shaftput into the usual sleeve or hearing member 5% for the setting wheels.

8 In a :aeroizing'device according-to claim 5 and e arrangement that thepins or studs 4L9 er-ztendinp; from the shaft pass through the hub ofthe setting wheel I or other sleeves or mounted upon the shaft, saidsleeves or 11 as being provided to a certain length of their periphery,suitably or of the same, with transverse slots whereby the surfaces ofthe slots serve to limit the movement of the pins or studs,

9. In a zeroizing mechanism according; to claim 7, the arrangement thatthe pins or studs d9 are put into transversal openings 51 of the shaft il and provided with grooves or recesses running in the longitudinaldirection of the shaft, said grooves or recesses corresponding with alzey .Ifl( 0\' ar ranged. in the shaft a locking hrr or such like/ 53being put into said hey groove and {IIOOVGS or recesses in order tosecurely lock the pins or studs.

10. In the zeroizing; mechanism according to claim 7" the arrangementthat the shaft, for instance the shaft let, passing through the setting;mechanism of the machine is prorided with a. pin 59 preferably attachedin the same way as the pins or studs 49, said pin being directlyactuated by the zeroizing organ.

1],. In a zeroizinp; mechanism according to claim 7, the arrangementthat the zeroizing organ consists of a double armed angle lever, the onearm 60 of which loosely mounted upon a sle ve 5st surrounding the shaft,say let passing; through the setting mechanism of the machine, and theother arm (31 of which is pivotable in relation to the former andprovided with a shoulder, pin or such like (32 adapted to be broughtinto engagement with the pin 59 or any other part extending from theshaft in the operative position of the arm.

12. In a zeroizing organ as claimed in claim 11, the arrangement thatthe arm 61 of the organ, adapted to actuate the pin 59 is actuated by aspring 64; in such way that the arm normally is retained in its restingposition in which it allows the free movement of the said pin during thecountin 13. In a zeroizing organ as claimed in claim 11, the arrangementthat the one arm of the organ is provided with a shoulder or surfaceadapted to, by the rotation of the other arm in relation to the former,stop the former in a certain end position.

14:. In a zeroizing organ according to claim 11, the arrangement thatthe organ a whole actuated by a spring moving the same back into itsinitial position.

15. An arrangement for setting the curve disks step-by-step andcomprisine pawls to ene'aeje internal teeth of the curve-disks, apivotal a: for aid pa'u'ls passing;- through the setting mechanisnnsprings to hold said pawls normally in engaged position, a shaft prvided with an arm, and remixing means to actuate said arm to bring thepawls out of mesh with the curve-disks during the szeroizing and therebyto facilitate their movement back into their zero position and to maketheir step-by-step setting impossible.

16. Ar embodiment of the arrangement according: to claim l5, includingan arm 78 provided with a pin or stud 79 adapted to ii lo alone curvedsurface or such like 80 1 aceroizinn; means, said zcroizing means alsohaving; means whereby the arm 78 with 74; is pressed out of its positionmeroizinc; is complete allowing the eng merit between the pawls 75 andthe curve-disks.

17. In a calculating! machine, in combination with curved disks andsetting; wheels, zeroizinn' means mounted for manual move ment. means toreturn the zeroiving means to normal position. pawls to engage teeth ofthe curve disks, a shaft on which said pawls are pivotally mounted saidshafthaving an arm actuated by the zeroizine means and also beingprovided with a pin for each of the nawls, and each pawl havingarecessto receive said pin to enable the pawl to be turned independentlyof the shaft during its engagement with the curved disks and to becaught by the shaft by means of the recess and pin during the rotationof the shaft, by the operation of the zeroiainp; means upon the saidarms.

In testimony whereof I affix my signature in presence of two witnesses.

KARL VIKTOR RUDIN.

